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Waste Water Engineering

Waste Water Engineering
If the depletion of oxygen is found to be 5 ppm after incubating a 2.5% solution of sewage sample for 5 days at 21°C, B.O.D. of the sewage is

50 ppm
200 ppm
100 ppm
150 ppm

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Waste Water Engineering
If is the diameter of upper circular portion, the overall depth of New Egg shaped sewer section, is

1.425 D
1.350 D
1.250 D
1.625 D

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Waste Water Engineering
Sewer manholes are generally provided at

The change of gradient
All of these
The change of direction
The junctions of sewers

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Waste Water Engineering
Pathogens (or pathogenic bacterias) in water may cause

Dysentery
Typhoid
All listed here
Cholera

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Waste Water Engineering
The maximum diameter of sewers adopted in the designs is

4.0 m
2.0 m
1.0 m
3.0 m

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Waste Water Engineering
The non-clog pump which permits solid matter to pass out with the liquid sewage, is

Centrifugal pump
None of these
Pneumatic ejector
Reciprocating pump

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